# ULG Recirculation Air Unit with Turbulent Mixed Flow Ventilation

*Recirculation Air Unit: Turbulent Mixed Flow (Class 1b OT)*

The ADMECO ULG is a ceiling-mounted recirculation air unit with turbulent mixed flow ventilation for operating theatres of class 1b and preparation rooms. Equipped with quiet EC radial fans, the ULG intensively flushes the OT without a defined sterile protection zone, reducing harmful substance and airborne bacteria concentrations to the desired minimum. Ultra-clean air is streamed turbulently and draft-free from the ceiling through H13 high-efficiency particulate filters, mixing with room air before being aspirated at floor level. The unit arrives completely pre-assembled and palletized for quick and easy on-site installation.

## Overview

- **Manufacturer:** ADMECO AG
- **Product type:** Air handling units
- **Usage classification:** Operating theatre class 1b air recirculation and ventilation

## Key features

- Torsion distributor with adjustable air flow direction
- Double sealing system with 2 sealing levels for continuously verifiable leak-free filter seals
- Total sound pressure level ≤ 48 dB(A); base level ≤ 40 dB(A)
- Pressure loss from 60 Pa
- Unit completely pre-assembled and palletized for quick installation
- Continuously variable operating modes 0-10 V
- Small EC fans consuming approximately 75 W per 600 m³/h
- H13 standard filter
- Installation height only 450 mm
- For use in operating theatres of class 1b and preparation rooms
- Air aspirated close to floor level to maximize room air mixing

## Highlights & advantages

### Competitive Advantage

- EC fans with DC motors deliver energy-efficient operation at approximately 75 W per 600 m³/h
- Reduced space requirements for air channels, smaller flow regulators and fire protection flaps lower investment costs
- Low proportion of fresh air minimizes operating costs
- Double sealing system (2 sealing levels) ensures continuously verified leak-free filter seals, filter frame and frame structure
- Continuously variable 0-10 V control for flexible operating modes
- Delivered fully pre-assembled and palletized: quick and easy installation in one piece on site
- Suitable for both class 1b operating theatres and preparation rooms

### Regulatory Certification

- DIN 1946-4: Operating theatre class 1b ventilation concept

### Clinical Indication

- Operating theatres of class 1b (lower infection risk procedures)
- Preparation rooms requiring controlled air quality

### System Compatibility

- Designed to replace or supplement centralized air conditioning with reduced ductwork
- Compatible with 0-10 V building management control signals

### Packaging Logistics

- Unit completely pre-assembled and palletized; installed on site in one piece

## Specifications

| Specification | Value |
| --- | --- |
| Installation height | 450 mm |
| Total sound pressure level | ≤48 dB(A) |
| Base sound pressure level | ≤40 dB(A) |
| Pressure loss | from 60 Pa |
| Fan power consumption | ~75 W per 600 m³/h |
| Filter class | H13 |
| Control interface | 0-10 V, continuously variable |
| OT room class | Class 1b |
| Fan type | EC radial fan with DC motor |

## Options & accessories

- **Air flow direction:** Adjustable via torsion distributor

## Frequently asked questions

### What is the difference between the ULG and the ULD recirculation ceiling?

The ULD provides a defined sterile protection zone with low-turbulence displacement flow (LTF/TAV) for higher-risk surgeries (class Ia/Ib with protection area), while the ULG uses turbulent mixed flow ventilation for class 1b OTs without a defined protection area, offering intensive room flushing at lower investment and energy cost.

### How is the double sealing system verified?

The double sealing system has 2 sealing levels (for the filter seals, the filter frame and the entire frame structure), and is designed to be continuously verifiable on site.

## Documents

- [ADMECO Double Sealing Seat (Doppeldichtsitz)](https://api.dev.mytradeloop.com/storage/9686~r87EEUetQGitDzMR) (spec_sheet, de)
- [Reference: Augen Glattzentrum AG, Wallisellen (CH)](https://api.dev.mytradeloop.com/storage/9694~H3zDdoqHof1wKURV) (case_study, de)

## Browse placement

- Furniture, Logistics › Furniture, Fixtures & Facility

## Tags

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> Made by [ADMECO AG](https://dev.mytradeloop.com/en/companies/admeco-ag-9676). Contact the manufacturer via their profile page.

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